The Community for Technology Leaders
RSS Icon
Issue No.04 - October-December (2010 vol.3)
pp: 257-265
Myrthe A. Plaisier , Utrecht University, Utrecht
Wouter M. Bergmann Tiest , Universiteit Utrecht, Utrecht
Astrid M.L. Kappers , Utrecht University, Utrecht
Item individuation, i.e., how we decide which parts belong to one object and which to another, is an important aspect of haptic perception and may be important for design of interfaces in which different buttons have to be distinguished. We daily hold several objects in our hand. Somehow, we decide that we are holding several small objects instead of one large object. We aim to provide insight into how it is decided that some parts belong to the same object and others to a different object, i.e., object individuation. This process may be influenced by heterogeneity of size or shape of the handled objects. To investigate this, subjects were asked to grasp varying numbers of shapes together in the hand and respond fast and accurately the number of shapes. We compared performance for a set of homogeneous objects (Experiment 1) to performance for sets of objects heterogeneous in size (Experiment 2) or shape (Experiment 3). It was found that numerosity judgments in terms of response times, error rates, and object handling were similar in all three experiments. We conclude that size and shape features that are used for object recognition do not play a role in item individuation.
Numerosity perception, object individuation, psychophysics.
Myrthe A. Plaisier, Wouter M. Bergmann Tiest, Astrid M.L. Kappers, "Haptic Object Individuation", IEEE Transactions on Haptics, vol.3, no. 4, pp. 257-265, October-December 2010, doi:10.1109/TOH.2010.6
[1] R.L. Klatzky, S.J. Lederman, and V.A. Metzger, "Identifying Objects by Touch: An 'Expert System'," Perception and Psychophysics, vol. 37, pp. 299-302, 1985.
[2] S.J. Lederman and R.L. Klatzky, "Hand Movements: A Window into Haptic Object Recognition," Cognitive Psychology, vol. 19, pp. 342-368, 1987.
[3] S.J. Lederman and R.L. Klatzky, "Relative Availability of Surface and Object Properties during Early Haptic Processing," J. Experimental Psychology: Human Perception and Performance, vol. 23, pp. 1680-1707, 1997.
[4] S.J. Lederman and R.L. Klatzky, "Haptic Identification of Common Objects: Effects of Constraining the Manual Exploration Process," Perception and Psychophysics, vol. 66, pp. 618-628, 2004.
[5] M.A. Plaisier, W.M.B. Tiest, and A.M.L. Kappers, "Salient Features in Three-Dimensional Haptic Shape Perception," Attention, Perception and Psychophysics, vol. 71, no. 2, pp. 421-430, 2009.
[6] K.J. Riggs, L. Ferrand, D. Lancelin, L. Fryziel, G. Dumur, and A. Simpson, "Subitizing in Tactile Perception," Psychological Science, vol. 17, pp. 271-272, 2006.
[7] M.A. Plaisier, W.M.B. Tiest, and A.M.L. Kappers, "One, Two, Three, Many—Subitizing in Active Touch," Acta Psychologica, vol. 131, no. 2, pp. 163-170, 2009.
[8] E. Kaufman, M. Lord, T. Reese, and J. Volkmann, "The Discrimination of Visual Number," Am. J. Psychology, vol. 62, pp. 498-525, 1949.
[9] J. Atkinson, F.W. Campbell, and M.R. Francis, "The Magic Number $4 \pm 0$ : A New Look at Visual Numerosity Judgments," Perception, vol. 5, pp. 327-334, 1976.
[10] G. Mandler and B.J. Shebo, "Subitizing: An Analysis of Its Component Processes." J. Experimental Psychology: General, vol. 111, pp. 1-22, 1982.
[11] L.M. Trick and Z.W. Pylyshyn, "What Enumeration Studies Can Show Us about Spatial Attention: Evidence for Limited Capacity Preattentive Processing," J. Experimental Psychology: Human Perception and Performance, vol. 19, pp. 331-351, 1993.
[12] L.M. Trick, "More Than Superstition: Differential Effects of Featural Heterogeneity and Change on Subitizing and Counting," Perception and Psychophysics, vol. 70, pp. 743-760, 2008.
[13] L.M. Trick and Z.W. Pylyshyn, "Why Are Small and Large Numbers Enumerated Differently? A Limited-Capacity Preattentive Stage in Vision," Psychological Rev., vol. 101, pp. 80-102, 1994.
[14] S. Coren, The Left-Hander Syndrome: The Causes and C of Left-Handedness. Vintage Books, 1993.
[15] M.A. Plaisier, W.M.B. Tiest, and A.M.L. Kappers, "Haptic Search for Spheres and Cubes," Haptics: Perception, Devices and Scenarios, M. Ferre, ed., pp. 275-282, Springer, 2008.
[16] K. Luwel, A.L. Beem, P. Onghena, and L. Verschaffel, "Using Segmented Linear Regression Models with Unknown Change Points to Analyze Strategy Shifts in Cognitive Tasks," Behavior Research Methods, Instruments, and Computers, vol. 33, pp. 470-478, 2001.
[17] D.G. Watson, E.A. Maylor, and L.A.M. Bruce, "The Role of Eye Movements in Subitizing and Counting," J. Experimental Psychology: Human Perception and Performance, vol. 33, pp. 1389-1399, 2007.
[18] M.A. Plaisier, I.A. Kuling, W.M.B. Tiest, and A.M.L. Kappers, "The Role of Item Fixation in Haptic Search," Proc. Third Joint EuroHaptics Conf. and Symp. Haptic Interfaces for Virtual Environment and Teleoperator Systems, pp. 417-421, 2009.
[19] R.L. Klatzky and S.J. Lederman, "Identifying Objects from a Haptic Glance," Perception and Psychophysics, vol. 57, pp. 1111-1123, 1995.
[20] M.A. Plaisier, W.M. Bergmann Tiest, and A.M.L. Kappers, "Haptic Pop-Out in a Hand Sweep," Acta Psychologica, vol. 128, pp. 368-377, 2008.
15 ms
(Ver 2.0)

Marketing Automation Platform Marketing Automation Tool